32 lines
1.1 KiB
Plaintext
32 lines
1.1 KiB
Plaintext
#
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# For a description of the syntax of this configuration file,
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# see the file kconfig-language.txt in the NuttX tools repository.
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#
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config FS_RAMMAP
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bool "File mapping emulation"
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default n
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depends on FS_REFCOUNT
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---help---
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NuttX operates in a flat open address space and is focused on MCUs that do
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support Memory Management Units (MMUs). Therefore, NuttX generally does not
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require mmap() functionality and the MCUs generally cannot support true
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memory-mapped files.
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However, memory mapping of files is the mechanism used by NXFLAT, the NuttX
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tiny binary format, to get files into memory in order to execute them.
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mmap() support is therefore required to support NXFLAT.
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If FS_RAMMAP is defined in the configuration, then mmap() will
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support simulation of memory mapped files by copying files whole
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into RAM. These copied files have some of the properties of
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standard memory mapped files.
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See nuttx/fs/mmap/README.txt for additional information.
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config FS_ANONMAP
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bool "Anonymous mapping emulation"
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default !DEFAULT_SMALL
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---help---
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Simulate private anonymous mappings by plain malloc
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